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forgot to add look at the 1992 MArin catalogue as it was an option on some of them then, retrobikeguy provided the scans. Only mentions it in the blurb at the start though.
I had a set of those on an early/mid 90s Pine Mountain. I loved them because they were my first ever suspension forks, but they weren't really very good and they made my bike feel like the headset was constantly loose...it wasn't.